Navigate to Settings > Game > Crosshair and click on the "Share" or "Import" button in the lower right corner of the Crosshair preview. Paste the CS2 code starting with "CSGO-" using "CTRL-V" and then click "Import."
No. Importing crosshairs is a feature from Counter Strike 2. We are just a collection of crosshair codes (literally just text). There are no downloads or programs to run.
We want to keep the quality of our database somewhat high. To avoid people spamming trash crosshairs, there is a cooldown for adding crosshairs.